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                   4545 Points
                   Joined September 2020
                
               
			  
			  
             
            
             The equity of 
Cr. A capital 1000
Cr. B capital remains the same
Market cap is for valuations. I have never seen a single problem related to revaluation of equity cause that upset the balance sheet.
EPS also doesn't use revalued amounts in its formula. 
Hence 
Cr. A capital 1000
Dr. B. Capital 1000